Performance of the DIII-D 110 GHz ECH system during the first year of operations and testing

Author

Wright, A.L. ; Allen, J.C. ; Cary, W.P. ; Harris, T.E.

Author_Institution

Gen. Atomics, San Diego, CA, USA

Volume

2

fYear

1993

fDate

11-15 Oct 1993

Firstpage

1092

Abstract

The first of four Varian 500 kW 110 GHz gyrotrons (VGT-8011) to be used in the new 2 MW 110 GHz electron cyclotron heating system being developed for the DIII-D tokamak was put into test at General Atomics within the last year. This gyrotron has been used to demonstrate the overall system efficiency and to validate the design of individual transmission line components. The first plasma heating observed with a 110 GHz was consistent with the power expected for the greater than 85% transmission efficiency of HE_1.1 power. A comparison of the General Atomics´ TE_15,2 to HE_1.1 mode converter with the Vlasov-type mode converter designed by the University of Wisconsin showed similar conversion efficiencies. The overall ECH system performance during the first year of testing will also be discussed

Keywords

fusion reactor design; fusion reactor ignition; fusion reactor operation; fusion reactors; gyrotrons; plasma radiofrequency heating; plasma toroidal confinement; power convertors; power transmission lines; 110 GHz; 2 MW; DIII-D ECH system; DIII-D tokamak; ECH system operation; ECH system testing; TE_15,2-HE_1.1 mode converter; VGT-8011; Varian gyrotrons; Vlasov-type mode converter; conversion efficiencies; electron cyclotron heating system; fusion reactor; system efficiency; transmission efficiency; transmission line components; Cyclotrons; Electrons; Gyrotrons; Heating; Helium; Plasmas; Power transmission lines; System testing; Tellurium; Tokamaks;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1993., 15th IEEE/NPSS Symposium on

Conference_Location

Hyannis, MA

Print_ISBN

0-7803-1412-3

Type

conf

DOI

10.1109/FUSION.1993.518513

Filename

518513